China's cemented carbide production accounts for about 40% of the world's sales nearly 20%

       my country's cemented carbide production accounts for about 40% of the world, but sales are nearly 20%. There are few high-performance high-end products. The development of such products is the top priority of cemented carbide development.



The more likely ones are:



1. The composition of cemented carbide and cermet cutting tools generally contains 20% WC, and the cutting tool materials include Al2O3, Si3N4, Sialon, etc.



Cermets can be made into indexable inserts or integral tools (reamers and milling cutters), which are mainly used in occasions that require high finishing surfaces. Ceramic tools have higher processing efficiency than coated carbide tools when processing hard-to-machine materials such as hardened steel and Incol718.



2. Sub-fine cemented carbide Sub-fine cemented carbide occupies nearly 25% of the world's cemented carbide market, and it continues to increase. Due to the miniaturization of products such as computers and mobile phones, and the support of newer and better PVD coating technologies. PVD coated inserts are usually in fine cutting, so it is consistent with the development trend of near net shape processing in industry.



3. Gradient cemented carbide Gradient cemented carbide (not including β-layer cemented carbide) is a more popular topic in recent years, which can be divided into C gradient, Co gradient and grain size gradient, etc. or the combination of these forms Exist; In terms of application, the gradient can be applied to cutting tools, mining tools and wear-resistant parts. In addition, the graded cemented carbide may also be used as the matrix of the superhard material composite sheet to improve the bonding strength of the cemented carbide and the diamond/boron nitride interface.



4. Cemented carbide cutting tools In addition, cutting tools are the largest added value of cemented carbide products. 70% of the domestic coated indexable insert market relies on imports. This part of cemented carbide materials should be developed.

5. Others, including ultra-coarse-grained cemented carbide, which can be used as a mineral alloy for occasions where fracture toughness is the main cause of failure; reticulated (dual phase) cemented carbide mining alloy buttons; hardened with no binder phase The alloy is used in optical lens molds, waterjet nozzles, etc.; rare earth cemented carbides, such as adding Re and Cr elements in the Co bonding phase, improve the electrical discharge machining performance of cemented carbide molds.